Slade drilled some pretty bad tendencies into Tara, not the least of which is this idea that she should be collecting information about
persons of interest. Back when she was with Slade, he defined "persons of interest" as basically anybody; over time this impulse has dulled just to people she has involved conversations with. It's something she's trying to break herself from doing, but Slade had really, really effective teaching methods, unfortunately. So she still catches herself doing it from time to time.
The information she gathers isn't anything private and she doesn't actually have any hacking skills, so what she knows is limited to what she gets told or what she can see other people talking about publicly in a given post. She's not going to hunt down information beyond that, because she
is trying to stop doing this so much. It's creepy and a gross invasion of privacy.
This is a short list of things she knows (or thinks she knows) about people she interacts with that they may or may not have told her themselves.
( it's not snooping if it's posted publicly )